How to interact with the Chef Server using the Chef Server API using Shell script
!/usr/bin/env bash
_chef_dir () {
# Helper function:
# Recursive function that searches for chef configuration directory
# It looks upward from the cwd until it hits /. If no directory is found,
# ~/.chef is chosen if it exists
# You could simply hard-code the path below
if [ "$PWD" = "/" ]; then
if [ -d ".chef" ]; then
echo "/.chef"
elif [ -d "$HOME/.chef" ]; then
echo "$HOME/.chef"
fi
return
fi
if [ -d '.chef' ];then
echo "${PWD}/.chef"
else
(cd ..; _chef_dir)
fi
}
_chomp () {
# helper function to remove newlines
awk '{printf "%s", $0}'
}
chef_api_request() {
# This is the meat-and-potatoes, or rice-and-vegetables, your preference really.
local method path body timestamp chef_server_url client_name hashed_body hashed_path
local canonical_request headers auth_headers
chef_server_url="https://api.opscode.com/organizations/my_org"
# '/organizations/ORG_NAME' is needed for Hosted Chef or Private Chef
if echo $chef_server_url | grep -q "/organizations/" ; then
endpoint=/organizations/${chef_server_url#*/organizations/}${2%%\?*}
else
endpoint=${$2%%\?*}
fi
path=${chef_server_url}$2
client_name="chef_user"
method=$1
body=$3
hashed_path=$(echo -n "$endpoint" | openssl dgst -sha1 -binary | openssl enc -base64)
hashed_body=$(echo -n "$body" | openssl dgst -sha1 -binary | openssl enc -base64)
timestamp=$(date -u "+%Y-%m-%dT%H:%M:%SZ")
canonical_request="Method:$method\nHashed Path:$hashed_path\nX-Ops-Content-Hash:$hashed_body\nX-Ops-Timestamp:$timestamp\nX-Ops-UserId:$client_name"
headers="-H X-Ops-Timestamp:$timestamp \
-H X-Ops-Userid:$client_name \
-H X-Chef-Version:0.10.4 \
-H Accept:application/json \
-H X-Ops-Content-Hash:$hashed_body \
-H X-Ops-Sign:version=1.0"
auth_headers=$(printf "$canonical_request" | openssl rsautl -sign -inkey \
"$(_chef_dir)/${client_name}.pem" | openssl enc -base64 | _chomp | awk '{ll=int(length/60);i=0; \
while (i<=ll) {printf " -H X-Ops-Authorization-%s:%s", i+1, substr($0,i*60+1,60);i=i+1}}')
case $method in
GET)
curl_command="curl $headers $auth_headers $path"
$curl_command
;;
*)
echo "Unknown Method. I only know: GET" >&2
return 1
;;
esac
}
chef_api_request "$@"
